:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel-2: #f0f2f5;
  --border: #e2e5ea;
  --text: #14171c;
  --muted: #6b7280;
  --accent: #2563eb;
  --up: #16a34a;
  --down: #dc2626;
  --up-bg: rgba(22, 163, 74, 0.14);
  --down-bg: rgba(220, 38, 38, 0.14);
  --warn: #d97706;
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --panel: #151b23;
    --panel-2: #1c232d;
    --border: #2a323d;
    --text: #e6e9ee;
    --muted: #8b95a3;
    --accent: #4f8cff;
    --up: #22c55e;
    --down: #f05252;
    --up-bg: rgba(34, 197, 94, 0.16);
    --down-bg: rgba(240, 82, 82, 0.16);
    --warn: #f59e0b;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-variant-numeric: tabular-nums;
}

button, input, select { font: inherit; color: inherit; }
button {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 7px 14px;
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }
input, select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  min-width: 0;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.muted { color: var(--muted); }
.small { font-size: 12px; }

/* top bar */
.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand svg { width: 24px; height: 24px; fill: none; stroke: var(--up); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.brand h1 { font-size: 17px; margin: 0; }
.badge { font-size: 11px; font-weight: 600; letter-spacing: .04em; padding: 2px 8px; border-radius: 99px; background: var(--panel-2); color: var(--muted); }
.badge.live { background: var(--up-bg); color: var(--up); }
.badge.demo { background: rgba(217, 119, 6, .16); color: var(--warn); }

.status { display: flex; flex-wrap: wrap; gap: 6px 18px; align-items: center; font-size: 13px; }
.status-item { display: inline-flex; align-items: center; gap: 6px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.dot.live { background: var(--up); box-shadow: 0 0 0 3px var(--up-bg); }
.dot.warn { background: var(--warn); }
.dot.err { background: var(--down); }
.meter { width: 60px; height: 6px; background: var(--panel-2); border-radius: 3px; overflow: hidden; border: 1px solid var(--border); }
.meter span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .3s; }
.meter span.full { background: var(--warn); }

/* layout */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 16px;
  padding: 16px 20px;
  max-width: 1500px;
  margin: 0 auto;
}
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; min-width: 0; }

.add-form { display: flex; gap: 8px; }
.add-form input { flex: 1; }
.form-error { color: var(--down); margin: 8px 0 0; font-size: 13px; }

.table-wrap { margin-top: 14px; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-size: 12px; font-weight: 500; color: var(--muted); padding: 6px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 10px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
.num { text-align: right; }
tbody tr { cursor: pointer; transition: background .15s; }
tbody tr:hover { background: var(--panel-2); }
tbody tr.selected { background: var(--panel-2); box-shadow: inset 3px 0 0 var(--accent); }
.sym { font-weight: 600; }
.sym-name { display: block; font-size: 12px; color: var(--muted); max-width: 180px; overflow: hidden; text-overflow: ellipsis; }
.region-tag { font-size: 10px; font-weight: 600; color: var(--muted); background: var(--panel-2); border: 1px solid var(--border); border-radius: 4px; padding: 0 4px; vertical-align: 2px; }
.last { font-weight: 600; border-radius: 4px; padding: 1px 4px; transition: background .8s; }
.flash-up { background: var(--up-bg); transition: none; }
.flash-down { background: var(--down-bg); transition: none; }
.up { color: var(--up); }
.down { color: var(--down); }
.pill { display: inline-block; min-width: 64px; text-align: right; padding: 2px 6px; border-radius: 6px; font-weight: 600; }
.pill.up { background: var(--up-bg); }
.pill.down { background: var(--down-bg); }
.feed { font-size: 11px; color: var(--muted); }
.feed.ws { color: var(--up); }
.bell { color: var(--warn); margin-left: 4px; }
.remove { background: none; color: var(--muted); padding: 2px 8px; font-size: 18px; line-height: 1; }
.remove:hover { color: var(--down); filter: none; }
.empty, .hint { color: var(--muted); font-size: 12px; }
.empty { text-align: center; padding: 24px 0; font-size: 14px; }

/* detail */
.detail-head { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; }
.detail-symbol { font-size: 20px; font-weight: 700; }
.detail-name { color: var(--muted); }
.detail-price { text-align: right; }
.big { font-size: 28px; font-weight: 700; }
.chg { font-weight: 600; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 8px; margin: 14px 0; }
.stat { background: var(--panel-2); border-radius: 8px; padding: 8px 10px; }
.stat span { display: block; font-size: 11px; color: var(--muted); }
.stat b { font-weight: 600; }

.chart-bar { display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.seg { display: inline-flex; background: var(--panel-2); border-radius: 8px; padding: 2px; }
.seg button { background: none; color: var(--muted); padding: 4px 10px; border-radius: 6px; }
.seg button.active { background: var(--panel); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,.15); }
.chart { height: 340px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }

.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px; }
.card { background: var(--panel-2); border-radius: 8px; padding: 12px; min-width: 0; }
.card h2 { font-size: 13px; margin: 0 0 10px; }
.alert-form { display: grid; gap: 8px; }
.alert-form label { display: grid; grid-template-columns: 100px 1fr; align-items: center; gap: 8px; font-size: 13px; }
.alert-form input { background: var(--panel); }
.alert-form button { justify-self: start; }
.info { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; margin: 0; font-size: 13px; }
.info dt { color: var(--muted); }
.info dd { margin: 0; overflow-wrap: anywhere; }
.info a { color: var(--accent); }

/* toasts */
.toasts { position: fixed; right: 16px; bottom: 16px; display: grid; gap: 8px; z-index: 10; max-width: calc(100vw - 32px); }
.toast { background: var(--panel); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: 8px; padding: 10px 14px; box-shadow: 0 6px 20px rgba(0,0,0,.2); animation: in .2s ease-out; }
.toast.alert { border-left-color: var(--warn); }
.toast.error { border-left-color: var(--down); }
@keyframes in { from { transform: translateY(8px); opacity: 0; } }

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; padding: 12px 16px; }
}
@media (max-width: 600px) {
  .topbar { padding: 12px 16px; }
  .hide-sm { display: none; }
  .cols { grid-template-columns: 1fr; }
  .chart { height: 260px; }
  .big { font-size: 22px; }
}

/* settings */
button.ghost { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
.status button.ghost { padding: 4px 12px; font-size: 13px; }
.form-error a, .hint a { color: var(--accent); }
.settings { width: min(480px, calc(100vw - 32px)); background: var(--panel); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.settings::backdrop { background: rgba(0, 0, 0, .5); }
.settings h2 { margin: 0 0 14px; font-size: 17px; }
.settings form { display: grid; gap: 12px; }
.settings a { color: var(--accent); }
.field { display: grid; gap: 6px; font-size: 13px; }
.field > span { font-weight: 600; }
.field .row { display: flex; gap: 8px; }
.field .row input { flex: 1; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 4px; }
@media (max-width: 600px) { .grid3 { grid-template-columns: 1fr; } }